This thesis investigates the introduction of action research in English language classrooms in Ordu, Turkey and the barriers to its use. The author conducted a case study with seven teachers from three schools. The study consisted of three action cycles between 1997-1999 where the teachers implemented action plans in their classrooms. The author analyzed issues that emerged from classroom observations, interviews with teachers, pupils, head teachers and the LEA. Barriers to action research identified included teacher-based reasons such as lack of time and training, and school-based reasons such as large class sizes and emphasis on exams. The author concludes with implications and suggestions for further action research studies.